"I woke up in hospital but I'm glad that I'm fine, and please tell my fans that I'm resting as the doctor instructed. I'm going back to Joburg because I have some meetings so I want to be well rested when I attend those meetings," Mkhize said.

"I will still make sure my fans get the best of Joyous Celebration music," he said.

Mkhize also said the doctor would still brief him about what caused the attack.

"For now they just said it is fatigue and I understand because we work very hard. I will hear from the doctors when they have done full tests," he said.

One of the members of the choir told Sunday World that members were terrified when they received the news about Mkhize's heart attack.

"The choir decided to keep it hush-hush for privacy reasons. We wanted him to recover without the attention of the public because it was bad and we did not know what would happen. A heart attack is unpredictable," said the singer, who asked not to be named.

Mkhize's business partner and friend, Jabu Hlongwane, said Mkhize travelled back to Joburg yesterday.

"He is fine now. As we speak, he is coming back to Joburg for the Joyous Celebration live recording," said Hlongwane.